title: Spin-7/2 nutation and Hahn-echo amplitudes in model compounds and application to the tetrahedral cluster Co4(CO)12.
abstract: Spin-7/2 central line intensities are calculated for any ratio of the quadrupolar coupling constant to the radiofrequency field for both one-pulse and two-pulse Hahn-echo experiments and tested by 59Co NMR on the model compounds, Na3[Co(NO2)6] and trans-[Co(en)2(NO2)2]NO3. The Hahn-echo sequence is then used to obtain the quadrupole coupling constant and asymmetry parameter on a powder sample of Co4(CO)12. This technique is found to be particularly useful when the NMR spectrum is broad and featureless.
authors.affiliation: Institut de chimie, UMR 50 CNRS, Bruker Spectrospin, Université Louis Pasteur, Strasbourg, France.
authors.forename: P
authors.initials: P
authors.lastname: Kempgens
authors.forename: J
authors.initials: J
authors.lastname: Hirschinger
authors.forename: P
authors.initials: P
authors.lastname: Granger
authors.forename: J
authors.initials: J
authors.lastname: Rosé
mesh_terms: D003035:Cobalt / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy / Q000379:methods*; D008432:Mathematical Computing; D011208:Powders
chemical_list: D011208:Powders; D003035:Cobalt